The patch below does not apply to the 4.19-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to stable@vger.kernel.org.

Thanks, Sasha

------------------ original commit in Linus's tree ------------------

From c056d480b40a68f2520ccc156c7fae672d69d57d Mon Sep 17 00:00:00 2001

From: Florian Fainelli f.fainelli@gmail.com Date: Tue, 30 Mar 2021 15:00:24 -0700 Subject: [PATCH] net: phy: broadcom: Only advertise EEE for supported modes

We should not be advertising EEE for modes that we do not support, correct that oversight by looking at the PHY device supported linkmodes.

Fixes: 99cec8a4dda2 ("net: phy: broadcom: Allow enabling or disabling of EEE") Signed-off-by: Florian Fainelli f.fainelli@gmail.com Signed-off-by: David S. Miller davem@davemloft.net --- drivers/net/phy/bcm-phy-lib.c | 13 ++++++++++--- 1 file changed, 10 insertions(+), 3 deletions(-)

diff --git a/drivers/net/phy/bcm-phy-lib.c b/drivers/net/phy/bcm-phy-lib.c index 53282a6d5928..287cccf8f7f4 100644 --- a/drivers/net/phy/bcm-phy-lib.c +++ b/drivers/net/phy/bcm-phy-lib.c @@ -369,7 +369,7 @@ EXPORT_SYMBOL_GPL(bcm_phy_enable_apd);

int bcm_phy_set_eee(struct phy_device *phydev, bool enable) { - int val; + int val, mask = 0;

/* Enable EEE at PHY level */ val = phy_read_mmd(phydev, MDIO_MMD_AN, BRCM_CL45VEN_EEE_CONTROL); @@ -388,10 +388,17 @@ int bcm_phy_set_eee(struct phy_device *phydev, bool enable) if (val < 0) return val;

+ if (linkmode_test_bit(ETHTOOL_LINK_MODE_1000baseT_Full_BIT, + phydev->supported)) + mask |= MDIO_EEE_1000T; + if (linkmode_test_bit(ETHTOOL_LINK_MODE_100baseT_Full_BIT, + phydev->supported)) + mask |= MDIO_EEE_100TX; + if (enable) - val |= (MDIO_EEE_100TX | MDIO_EEE_1000T); + val |= mask; else - val &= ~(MDIO_EEE_100TX | MDIO_EEE_1000T); + val &= ~mask;

phy_write_mmd(phydev, MDIO_MMD_AN, BCM_CL45VEN_EEE_ADV, (u32)val);